fix sliver fixed pinned appbar #36333
Merged
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Description
Fixes a bug introduced in #35574 by splitting the semantics logic from the overlap shadow logic.
Fixes #35488 again
Tests
I added the following tests:
New test to cover that a sliver app bar that is fixed and pinned does not cast a shadow when it is not overlapping content.
Checklist
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[x]). This will ensure a smooth and quick review process.///).flutter analyze --flutter-repo) does not report any problems on my PR.Breaking Change
Does your PR require Flutter developers to manually update their apps to accommodate your change?